FactoidThe shifting harmonics in this piece were created by using 'whirly tubes'- plastic tubes that generate different harmonics depending on how fast they are spun, and a cello - recorded in Chislehurst Caves, a labyrinthine network of 20 miles of subterranean tunnels

FactoidThe shifting harmonics in this piece were created by using 'whirly tubes'- plastic tubes that generate different harmonics depending on how fast they are spun, and a cello - recorded in Chislehurst Caves, a labyrinthine network of 20 miles of subterranean tunnels

FactoidThe shifting harmonics in this piece were created by using 'whirly tubes'- plastic tubes that generate different harmonics depending on how fast they are spun, and a cello - recorded in Chislehurst Caves, a labyrinthine network of 20 miles of subterranean tunnels

FactoidThe shifting harmonics in this piece were created by using 'whirly tubes'- plastic tubes that generate different harmonics depending on how fast they are spun, and a cello - recorded in Chislehurst Caves, a labyrinthine network of 20 miles of subterranean tunnels

FactoidThe shifting harmonics in this piece were created by using 'whirly tubes'- plastic tubes that generate different harmonics depending on how fast they are spun, and a cello - recorded in Chislehurst Caves, a labyrinthine network of 20 miles of subterranean tunnels

FactoidThe shifting harmonics in this piece were created by using 'whirly tubes'- plastic tubes that generate different harmonics depending on how fast they are spun, and a cello - recorded in Chislehurst Caves, a labyrinthine network of 20 miles of subterranean tunnels

FactoidThe shifting harmonics in this piece were created by using 'whirly tubes'- plastic tubes that generate different harmonics depending on how fast they are spun, and a cello - recorded in Chislehurst Caves, a labyrinthine network of 20 miles of subterranean tunnels

FactoidThe shifting harmonics in this piece were created by using 'whirly tubes'- plastic tubes that generate different harmonics depending on how fast they are spun, and a cello - recorded in Chislehurst Caves, a labyrinthine network of 20 miles of subterranean tunnels

FactoidThe shifting harmonics in this piece were created by using 'whirly tubes'- plastic tubes that generate different harmonics depending on how fast they are spun, and a cello - recorded in Chislehurst Caves, a labyrinthine network of 20 miles of subterranean tunnels

FactoidThe shifting harmonics in this piece were created by using 'whirly tubes'- plastic tubes that generate different harmonics depending on how fast they are spun, and a cello - recorded in Chislehurst Caves, a labyrinthine network of 20 miles of subterranean tunnels

FactoidThe shifting harmonics in this piece were created by using 'whirly tubes'- plastic tubes that generate different harmonics depending on how fast they are spun, and a cello - recorded in Chislehurst Caves, a labyrinthine network of 20 miles of subterranean tunnels

FactoidThe shifting harmonics in this piece were created by using 'whirly tubes'- plastic tubes that generate different harmonics depending on how fast they are spun, and a cello - recorded in Chislehurst Caves, a labyrinthine network of 20 miles of subterranean tunnels